Question

1. choose the best answer.

the four outer planets differ from the inner planets in that they are ______ planets and the largest in the solar system.
options: gas, rocky, plasma, water

1. choose the best answer.

viewed without a telescope, a planet appears to ______ and its brightness can increase or decrease over time.
options: blink, spin quickly, twinkle, shine steadily

Explanation:

1) For the first question:

The outer planets (like Jupiter, Saturn) are gas - giant planets, mainly composed of gas. Inner planets are rocky. Plasma and water are not the main composition difference between outer and inner planets. So the outer planets are gas - type compared to inner rocky planets.

Planets, when viewed without a telescope, shine steadily. Stars twinkle because of atmospheric interference, and planets don't blink or spin quickly in a way that affects their brightness stability like that. So a planet appears to shine steadily, and its brightness is relatively stable (doesn't increase/decrease much in a noticeable way quickly).

Answer:

gas (the option with "gas" text, assuming the first option is gas - related as per the visible options in the image)

2) For the second question: